16.12.0.0/24

ip:	16.12.0.0 s3-sa-east-1.amazonaws.com
loc:	Brazil, São Paulo (São Paulo)  
isp:	AS16509 Amazon.com, Inc. » Amazon.com, Inc. » AWS S3 (sa-east-1) 1.075 ms
route:	16.12.0.0/24, AMAZO-4 - Amazon.com, Inc., US (São Paulo) ... 
reg:	16.12.0.0/16, US, ARIN, 2019-04-04
asn:	AS16509 - AMAZON-02 Amazon.com Inc., US
addr:	  Amazon Web Services Inc. P.O. Box 81226 Seattle WA 98108-1226 US
online:	  96 » latency: 208 ms (208ms) 

see also:
   16.12.0.0/16     AS16509  AMAZO-4 Amazon.com, Inc., US